Hey guys I started a thread over on the bullnose forum several months back about rebuilding my engine, and well life got in the way and has set me back several months.

https://www.ford-trucks.com/forums/1...d-project.html

As of right now I have the following:

https://www.ebay.com/sch/hec-tina/m....=1&_ipg=&_from=

Brand New OXX 300 block
Brand New OXX Connecting Rods
Brand New OXX Crank Shaft
Rubber Ford OEM Oil Pan Gasket
Brand New OXX Valve Cover (Slight Scuff Outside) Super Cheap
Brand New OXX Side Cover (Slight Scuff Outside) Super Cheap

66-237-4 - High Energy? Hydraulic Flat Tappet Camshafts

Comp Cam 260H 66-237-4 Cam
Comp Cam 3224 Timing Set
Comp Cam 7866-12 Push Rods
Comp Cam 903-12 Valve Springs
Comp Cam 601-12 Valve Locks
Comp Cam 502-12 Valve Seals

Sealed Power R-948 Rocker Arms
Sealed Power MR-1847 Rocker Arm Bolts

Offenhauser Dual Port Intake Manifold 6019DP

New 0 Mile EFI Exhaust Manifolds

I purchased a new harmonic balancer last week along with some ARP head bolts and a new cam thrust plate, finishing kit and a walker "Y" pipe.

I still need sever items I was hoping to get recommendations on.

I will start out with asking about the oil pump as it is on my list to get next. Should I go with a high volume pump or standard pump.

I am looking at a SEALED POWER 22441124 for the standard replacement or the SEALED POWER 22441124V for the high volume.

Any reason not to go with the high volume on a 300?

Thanks,
Cody

 

If I were doing your build I'd select the hi-volume pump. Others will warn of excessive loading on the distributor gear, but that has not been problematic for me. I do replace the roll pin in the gear with a piece of .125" diameter welding wire. Never been a problem, even with high lift roller cams.

 

Thanks for the feedback and mentioning about the cam gear roll pin. I will definitely look at replacing it with a piece of solid wire.

Also, which high volume oil pump would you pick:
MELLING M74HV
ENGINETECH EP74HV
SEALED POWER 22441124V

I am not a brands person, so if you have any suggestion, I am all open.

Thanks,
Cody

 

Which cylinder head?

 

It has a E7TE-DC head on it currently as the engine I am replacing was a remaned from about 15 years ago.

That leads to another question, should I use the E7TE-DC head which is an EFI head, or should I order a remaned carb head? I am planning on having the machine shop replace the springs, locks and oil seals from my comp cam kit either way even if I go with the remaned head.

https://www.ford-trucks.com/forums/s...8&postcount=24

https://www.ford-trucks.com/forums/s...5&postcount=25

 

It depends on which pistons you are using. I didn't see pistons listed?
The Carb head will drop the compression ratio 1/2 a point.
Also, only the 1985 and 1986 carb heads use the pedestal mount rockers.

 

I was under the impression that the carbed 86 heads used hydraulic lifters and bolt down rockers not studs.

Either way, is there any benefit building a 300 with a carbed head vs an efi head?

This is the one I am looking at.

https://www.oreillyauto.com/detail/b...der+head&pos=1

Would I be better off having the efi head rebuilt at the machine shop?

 

You are correct. 85 and 86 heads use bolt down rockers. I used the description of "pedestal mount rockers" which is the same as bolt down.

The advantage of the carb head is that there is better flow under .400" valve lift than the EFI head because the EFI combustion chamber is designed to shroud the valves in order to create swirl.
We recently did a flow bench comparison between the carb and EFI head to verify this.

The larger carb head combustion chamber will still allow you to get in the desired range for a compression ratio that will work with the Comp 260 cam using off the shelf hypereutectic pistons.

What pistons are you going to use?

 

Sorry for the misunderstand and thank you for clearing up the rocker comment. I guess that settles it, I will plan on going with the carbed head.

As far as the pistons, do you have a good recommendation? I have not really dived into looking at them yet honestly. I know I will probably get them from summit as I received a $20 off coupon code when I bought the Offenhauser Dual Port Intake Manifold.

 

https://www.summitracing.com/parts/u...view/make/ford

These have the highest compression height (1.776") and the lowest dish volume.
You will have around a 8.4 compression ratio which will give you a 7.2 dynamic compression ratio if the cam is installed with the intake lobe center at 106 degree ATDC as specified.
This will allow the use of low octane pump gas without detonation.

I would have recommended a cam with a lot more advertised duration so the compression ratio could be a lot higher.

 

What cam would have you recommended? I just went with a comp cam 260H to get the entire kit? Would you have gone with the 268H?

 

The stock cam is a 268.
I would have gone with the Comp 268 only because the valve lift is below .500"

The valve length on the 1985 and later bolt down rocker heads is 4.750" and the valve retainer will run into the valve guide tower if the lift is over .500"
The early heads have a 4.810" long valve and will allow cams with more valve lift.
If the early longer valves are used then I would use a cam from another company that has more valve lift.

The last engine I assembled used a CNC ported 85 head with 4.910" SBC valves, with 2.02" intake valves and 1.6" exhaust.
The cam had 232 degrees of .050" duration and 288 advertised .534" valve lift with BBC roller rockers. 9.75 compression ratio.
4 barrel intake with a quick fuel 650 carb and a set of headers.
There is still a ton of torque at 2000 rpm and 70 mph only requires a slight touch on the gas pedal.
The owner reports 18 mpg at 70 mph from Spokane WA to Boise ID in a 77 2wd pickup.

 

I contacted the seller on amazon about the cam to see if I could swap it out with the 268H. I will let you know what they say.

 

if I'm not mistaken, the 85 and 86 head still use a 4.810" valve. EFI got the 4.750. At least that's what i gathered from SI, and I got 4.810 valves for my 85 head.

 

Next question, which head gasket?

FEL-PRO 8168PT (PermaTorque)
or
FEL-PRO 525SD (PermaTorque Severe Duty)

https://www.rockauto.com/en/catalog/...ket+/+set,5412